Question

is the answer pi/4
Find the period of the function.

y = -3 cos 1/4x

pi/4
-3
3pi/4
8π

Answer 1

nope. think again!

Answer 2

oh is it -3?? i got amplitude and period mixed up because amp is always positive

Answer 3

You need to write down the form, of how a cossine function looks. It would be:

y= A * cos(w*x), where A is the amplitude and w is the angular frequency, w= 2*pi/ T, where T is the period of the function.

So by looking at it you can tell that 1/4 = 2*pi/T.

Answer 4

@Barsukis is right!